초록 ▼

A disc may have a backing member or sheet and an abrasive sheet, each with first and second opposed faces. The first face of the abrasive sheet may be attached to the second face of the backing sheet and the second face of the abrasive sheet may be provided with abrasive particles. Alternatively, th

A disc may have a backing member or sheet and an abrasive sheet, each with first and second opposed faces. The first face of the abrasive sheet may be attached to the second face of the backing sheet and the second face of the abrasive sheet may be provided with abrasive particles. Alternatively, the sheets may be integrated into a single member. A staple is attached to the sheets and is provided with body and end portions. The body portion of the staple extends along the first surface of the abrasive sheet and the end portions of the staple extend through the sheets. The end portions are turned inwardly against the second surface of the backing sheet. In one embodiment, the sheets have a central opening and the end portions of the staple abut the second surface of the backing sheet. A holder detains the body portion of the staple. In another embodiment, the end portions of the staple define a looped relationship with the second surface of the backing sheet and the holder cooperates with such looped relationships to detain the disc. The detention by the holder may be provided at the periphery of the holder or at positions within the holder. The holder and the disc may be associated with a camming member and with a reinforcing plate. The camming member and the reinforcing plate cooperate with each other and with the holder to insure that the holder and the disc can be easily removed from the camming member and the reinforcing plate even when the holder has become jammed against the reinforcing plate by the application of a force by a workpiece against the disc.

대표청구항 ▼

An abrasive disc for retention by detaining means and for application against a workpiece, including, means including a backing member having first and second opposite faces, there being particles on the first face of the means including the backing member for application against the workpiece, at l

An abrasive disc for retention by detaining means and for application against a workpiece, including, means including a backing member having first and second opposite faces, there being particles on the first face of the means including the backing member for application against the workpiece, at least one staple attached to the means including the backing member, the staple including a body portion and opposite ends extending from the body portion with the body portion extending along a particular one of the first and second faces of the means including the backing member and with the opposite ends extending through the other one of the first and second faces of the means including the backing backing member and being bent toward the other one of the first and second faces for detention of the staple on the means including the backing member and for coupling of the staple to the detaining means, the body portion and the opposite ends of the staple defining substantially a common plane.